HP 30 30 manual FU2-39 Control mode selection, FU2Control mode

Chapter 6 - Parameter Description [FU2]

This parameter affects the audible sound of the motor, noise emission from the inverter, inverter termperature, and leakage current. If the ambient temperature where the inverter is installed is high or other equipment may be affected by potential inverter noise, set this value lower. If set above 10kHz, use it by reducing 5%[1kHz] of the rated current. Setting Carrier freqeuncy set below 2.5[kHz] when the FU2-39 [Control mode selection] is set to Vector_SPD, Vector_TRQ could weaken the control performance.

FU2-39: Control mode selection

FU2►Control mode				39			0
39		V/F
Factory Default:			V/F		0
	Selects the control mode of the inverter
	FU2-40 setting		LCD Display				Description
	0		V/F				V/F Control
	1		Slip compen			Slip compensation
	2		Sensorless_S			Sensorless vector
					control speed operation
	3		Sensorless_T			Sensorless vector
					control torque operation
	4		Vector_SPD		Vector control speed
							operation
	5		Vector_TRQ		Vector control torque
							operation

Note) Setting Vector_SPD, Vector_TRQ is only valid when the inverter is equipped with SUB-B board and EXT-12[F mode] is set to Feed-back. Vector control comprises of Vector_SPD, Vector_TRQ with secsorless vector Sensorless_S and Sensorless_T.

V/F control:

This parameter controls the voltage/frequency ratio constant. It is recommended to use the torque boost function when a greater starting torque is required.

Related function : FU1-26~28 [Torque boost]

Slip compensation :

This function is used to maintain constant motor speed. To keep the motor speed constant, the output frequency varies within the limit of slip frequency set in FU2-32

according to the load current. For example, when the motor speed decreases below the reference speed (frequency) due to a heavy load, the inverter increases the output frequency higher than the reference frequency to increase the motor speed. The inverter increases or decreases the output by delta frequency shown below.

Delta freq = Rated slip * (Output current - Motor No load current) / rated current - Motor No load current) Output freq = Reference freq + Delta freq

☞: Motor parameters must be set correctly for better performance of control.

FU2-32~36 [Motor related parameters] is automatically determined by FU2-30 [Rated Motor selection]. Most suitable motor capacity corresponding inverter capacity is set as factory setting, but the following setting value can be adjusted if necessary.

Related parameter :FU2-30~37 [Motor related parameters]

Code	LCD Display	Description
FU2-30	Motor select	Select motor capacity
FU2-32	Rated-Slip	Motor rated slip (Hz)
FU2-33	Rated-Curr	Motor rated current (rms)
FU2-34	Noload-Curr	Motor no load current (rms)
FU2-36	Efficiency	Motor efficiency (%)
FU2-37	Inertia rate	Motor inertia rate

Sensorless_S (Sensorless vector speed control) operation :

Use it when 1) high starting torque needed at low speed 2) load fluctuation is high 3) rapid response needed.

If not using CMC 220V/440V Class motor: Set Yes in FU2- 40 [Auto tuning] first.

Vector_SPD (Vector control speed) operaation : only valid when Sub-B board is mounted (Speed-detecting Encoder installed to the motor).

Related parameters : FU2-30~37 [Motor related parameters] FU2-41~44 [Motor constant] FU2-45~46 [P/I gain for Sensorless] EXT-25~26 [P/I gain for Vector_SPD],

EXT-27~28 [Torque limit for Vector_SPD]

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